21387964

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{29}}^1\times {\mathrm{1091}}^1$

素因数の和:1150

約数の個数: 36

約数和(自身を含む): 41965560

約数和(自身を除く): 20577596

約数列:

[1, 2, 4, 13, 26, 29, 52, 58, 116, 169, 338, 377, 676, 754, 1091, 1508, 2182, 4364, 4901, 9802, 14183, 19604, 28366, 31639, 56732, 63278, 126556, 184379, 368758, 411307, 737516, 822614, 1645228, 5346991, 10693982, 21387964]

約数ペア:

[(1, 21387964), (2, 10693982), (4, 5346991), (13, 1645228), (26, 822614), (29, 737516), (52, 411307), (58, 368758), (116, 184379), (169, 126556), (338, 63278), (377, 56732), (676, 31639), (754, 28366), (1091, 19604), (1508, 14183), (2182, 9802), (4364, 4901)]